Ksenia Sobchak, registered as a presidential candidate, filed a lawsuit with the Supreme Court in mid-February.

The Supreme Court refused to recognize the registration of Vladimir Putin as a presidential candidate illegal, dismissing the claim of Ksenia Sobchak.

"To set aside the administrative lawsuit of Ksenia Anatolyevna Sobchak on the abolition of the CEC decision dated February 6, 2018 ‘On the registration of Vladimir Vladimirovich Putin as the candidate for the post of President of the Russian Federation’," judge Nikolay Romanenkov announced.

Ksenia Sobchak, registered as a presidential candidate, filed a lawsuit with the Supreme Court in mid-February. Sobchak asked to recognize the registration of Vladimir Putin as the presidential wannabe illegal. In the lawsuit Sobchak stated that Putin "has no right to be nominated and be registered as a candidate for the presidency of the Russian Federation", as he had already held this post three times.

Sobchak also pointed out that in 2012, Putin agreed with Dmitry Medvedev bypassing the law on "temporary assignment of the post of the Russian President with an obligation to back it out after a specified period."